2 GEOLOGICAL Function
None Parker et al. ( 2005 ) neither Search mais aussi al. ( 2005 ) attempted a great phylogenetic research from R. callenderi according to the new skeletal material. not, each other organizations listed multiple features of the newest hindlimb which were unambiguous synapomorphies regarding Pseudosuchia. Parker et al. ( 2005 ) hypothesized a potential brother-group relationship with aetosaurs, noting the new morphological similarities of the squamosal and paramedian osteoderms. An equivalent condition is recommended of the Have a look mais aussi al. ( 2005 ) considering unspecified reputation states of tarsus therefore the osteoderms. Brusatte et al. ( 2010 ) integrated Roentgen. callenderi in their analysis out-of early archosaur relationships, coding from the penned numbers and definitions of Parker mais aussi al. ( 2005 ) and you may Seem et al. ( 2005 ). That data retrieved Roentgen. callenderi since the brother taxon towards the early-diverging suchian clade Ornithosuchidae. ( 2011 ) retrieved Roentgen. callenderi for the a well-served updates due to the fact sister taxon so you’re able to aetosaurs, an outcome supported by newer education (age.grams., Butler mais aussi al., 2014 ; ; Nesbitt & Butler, 2013 ; Nesbitt mais aussi al., 2014 ; Nesbitt ainsi que al., 2020 ; Nesbitt, Stocker, ainsi que al., 2018 ).
So it share completely refers to the osteology regarding R. callenderi predicated on a minimum of a dozen some body (according to femora number) regarding PEFO plus about three really-kept related partial skeletons gathered anywhere between 2005 and you will 2015, brings osteohistological context, and you may talks about the new taxon’s characteristics getting facts early suchian progression.
2.step one Stratigraphic standing
Which malfunction off R. callenderi is mostly centered on point out-of multiple localities regarding Chinle Development of Petrified Forest National Park (PEFO), Washington, Us (Figure step 1; see Health-related Paleontology). The top Triassic Chinle Formation in this field constitutes predominantly fluvial and floodplain strata away from switching claystones, siltstones, sandstones, and you may conglomerates (Billingsley, 1985 ; Heckert & Lucas, 2002a ; ). The latest Chinle Development about Petrified Tree National Park urban area preserves well-recognized traditional assemblages away from flowers (palynomorphs, simply leaves, wood), invertebrates, and you can vertebrates (age.grams., Ash, 2005 ; Baranyi et al., 2018 ; A beneficial, 1998 ; Irmis, 2005 ; Litwin, Traverse, & Ash, 1991 ; Parker, 2005b , 2006 ; Reichgelt et al., 2013 ). Really non-dentigerous and you can non-osteoderm specimens out-of Roentgen. callenderi of PEFO, and additionally men and women demonstrated right here, have been discovered immediately a lot more than Coated Desert Sandstone step three (sensu Billingsley, 1985 ; Lithodendron Wash Bed sensu Heckert & Lucas, 2002a ) between the main Petrified Forest Associate (sensu Woody, 2006 ) of your own upper the main Chinle Creation (Heckert & Lucas, 2002a ; Irmis, 2005 ; Padian, 1990 ; Parker, 2005b , 2006 ; Parker ainsi que al., 2005 ; Parker & ). Remote white teeth out-of Roentgen. callenderi had been retrieved away from microvertebrate assemblages away from low in this new Chinle Development on PEFO, extending the brand new stratigraphic cheekylovers beДџenenleri gГ¶rme directory of it taxon into Sonsela User and you can best Blue Mesa Affiliate (select Systematic Paleontology).
The three chief localities one produced the specimens from R. callenderi revealed right here (Analysis S1) is the Revueltosaurus Quarry (PFV 297), Revueltosaurus Quarry SW (PFV 414), plus the Giving Webpages (PFV 231). These sites exists because the paleosols during the a loaded fluvial series in the the center of this new Petrified Tree Associate (Atchley ainsi que al., 2013 ; Loughney et al., 2011 ; Parker et al., 2005 ; Parker & ). PFV 297 and you can PFV 414 try split spatially of the 20 m and they are consequently about 2 hundred yards with the the southern area of of PFV 231 (Contour 1a). Decorated Desert Sandstone step 3, and that immediately underlies most of the around three localities, is actually stratigraphically
40–fifty yards over the root of the Petrified Forest Member (Profile 1b; Parker & ), and you will stands for a layer sandstone deposited of the recurrent circulate from inside the a good highest sinuosity lake route (Johns, 1988 ). PFV 297 and you may PFV 414 can be found a little highest on sequence than just PFV 231 (Parker & ).